Date: Wed, 29 Feb 2012 15:20:00

Author: --- "R. W. Tarara"

Subject: Re: How to Measure Doppler Shift


I would think you only want to use one speaker at a time? Doppler effect is
between A source and AN observer.

A setup with microwaves with both source and detector at one end and the
moving cart with a nice reflector should model Police Radar pretty well.
There they do measure the beat frequency to determine the speed.


Richard W. Tarara
Professor of Physics
Saint Mary's College
Notre Dame, Indiana

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From: "Jerry DiMarco"
Sent: Wednesday, February 29, 2012 1:40 PM
Subject: Re: [tap-l] How to Measure Doppler Shift

> Seems like this setup would produce an interference pattern between
> the speakers that would make it more difficult to interpret the results.
> Is that a problem?
> Jerry D
> At 2/29/2012 01:20 PM, you wrote:
>> writes:
>> >Leave the sources stationary and move the mic between them.
>> >--------------------------
>> >Sam Sampere
>>Same here. Use a 2 m PASCO mechanics track. Plastic go car (quieter
>>wheels) with a wireless mic atop it. Large speakers at each end.
>>Push and enjoy.

From Wed Feb 29 16:01:35 2012
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